Effect of EVA Dosage and Type on the Properties of High Dose Desulfurized Rubber Modified Asphalt

Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, Gansu Province Research Center for Basic Sciences of Surface and Interface Chemistry, College of Chemical Engineering, Northwest Minzu University, Lanzhou 730124, China

^* Corresponding author: gszhangh@126.com

Abstract

Conventional rubber powder modified asphalt is widely used, but there are drawbacks such as high viscosity, processing difficulties, and poor storage stability, which are avoided by using desulfurized rubber powder. In this study, waste desulfurized rubber powder (DRP) and ethylene vinyl acetate copolymer (EVA) were used as asphalt modifiers. The performance of composite modified asphalt with different VA content and EVA dosage was investigated. It was concluded that the high temperature performance of EVA-1 was superior to EVA-3, but the low temperature effect was average. The modified asphalt prepared with EVA-3 was better suited for cold weather, and the modified asphalt prepared with EVA-2 exhibited good performance in both high and low temperature plasticity, making it suitable for cold weather conditions. good low-temperature plasticity, can improve the physical properties of waste rubber modified asphalt, suitable for conventional asphalt pavement.